Measurement of laminar burning velocities of diethyl ether-air premixed mixtures

Measurement of laminar burning velocities of diethyl ether-air mixtures were conducted at different initial pressures, initial temperatures and equivalence ratios by using the spherically propagating flame and schlieren photography method. The results show that the unstretched laminar burning velocities are increased with the increase of initial temperature and the decrease of initial pressure. Markstein lengths are decreased with the increase of initial temperature, initial pressure and equivalence ratio, indicating an increasing in instability of flame front with the increase of initial temperature, initial pressure and equivalence ratio. Based on the experimental data, a formula of the unstretched laminar burning velocity is correlated.